Vintage SUN filter for a telescope.
![](https://i2.wp.com/junkpirate.com/wp-content/uploads/1503331964.jpg?fit=1080%2C1080&ssl=1)
These were a bad idea (imagine one failing while you’re looking at the sun through a telescope!) and aren’t manufactured for consumers anymore.
These were a bad idea (imagine one failing while you’re looking at the sun through a telescope!) and aren’t manufactured for consumers anymore.